body{
    width: 100%;
    text-align: center;
    background-color: #F0F2F5;
}
#nav-top{
    background-color: #00B5AD;
    height: 4px;
}
.container-nav{
    width: 100%;
    border-radius: .28571429rem;
    font-weight: 400;
    background-color: #FFFFFF;
}
.centered{
    min-height: 200px;
}

.container{
    width: 1200px;
    margin: 0 auto;
}
.nav{
    width: 1200px;
    height: 47.3px;
    color: #777;
}
.container .nav nav{
    display: flex;
    justify-content: space-around;
}
.nav-left,.nav-right{
    padding: 11.6px 10.4px;
    text-align: center;
    line-height: 24px;
    color: #777;
    font-size: 1rem;
    font-weight: 400;
}
#nav-left{
    width: 55%;
    float: left;
}
#nav-right{
    float: right;
}
/* logo和Lernku功能区域 */
.tuwen img,.tuwen span{
    text-align: center;
    float: left;
}
#nav-left span{
    margin-top: 2px;
    margin-left: 11px;
    font-size: 14px;
    color: #888888;
}
#logo{
    width: 26px
}
#xiala{
    width: 15px;
    padding: 10px 0 0 18px;
}
#shequ{
    width: 18px;
}
#new{
    width: 50px;
}
#shequ,#new{
    margin-top: 4px;
}
#nav-left form{
    padding:.32857143em .74285714em;
}
#nav-left form input{
    border-radius: 500rem;
    line-height: 1.2142em;
    border: 1px solid #D9D9D9;
    /* width: 228px; */
    font-size: 1em;
    padding: .47142857em 0 .47142857em 17px;
    outline: none;
    box-shadow:none;
}
#nav-left input::-webkit-input-placeholder { /* WebKit browsers */ 
    color: #D9D9D9; 
}

/* 底部 */
#footer{
    margin-top: 64px;
    padding: 40px 0;
    background-color: #1B1C1D;
    width: 100%;
    margin: 0 auto;
    color:  hsla(0,0%,100%,.9);
}
/* #footer-top{width: 100%;} */
#footer-top ,#footer-bottom{
    width: 1200px;
    display: flex;
    text-align: center;
    margin: 0 auto;
    flex-direction: row;
    /* background-color: red; */
    height: auto;
}

.clumn{
    width: 25%;
    border-left: 1px solid #524949;
}



.clumn div{
    margin-bottom: 14px;
}
.clumn img{
    width: 20px;
}
.lh-3 {
    line-height: 1.75rem!important;
}
.bottom-nav{
    font-weight: 700;
}

/* 底部内容板块第一栏白色背景图片 */
.white-img img{
    background-color: white;
    width: 32px;
    border-radius: 6px;
    top: -5px;
    margin-right: .75rem;
    margin-top: .14285em;
}
.white-img h4 span{
    line-height: 1.2857em;
    vertical-align: middle;
}
/* 底部内容带有图片区域 */
.bottom-img img{
    vertical-align: middle;
}

/* 底部板块主要内容链接区域 */
.bottom-center{
    vertical-align: middle;
    font-weight: 300;
    font-size: 13px;
}
.bottom-a h4 {
    font-weight: normal;
}
.bottom-a span{
    text-decoration:underline;
}
.mobe-1 h4 a{
    color: hsla(0,0%,100%,.5);

}
#footer-bottom{
    display: block;
    margin-top: 10px;
    height: auto;
    /* background-color: #dddd; */
}
/* 底部赞助商栏 */
.bottom-top3 img{
    height: 20px;
    width: auto;
    padding: 3px 0;
}
/* 底部举报路径 */
#footer-bottom{
    white-space:pre;
    padding-top: 30px;
    border-top: 1px solid #524949;
    font-size: 14px;
    color: #e27575;
}
#footer-bottom a img{
    vertical-align: middle;
    padding-right: 3px;
}
#footer-bottom a{
    color: #e27575;
    padding: 0 5px;
    font-size: 14px;
    /* vertical-align: middle; */
}
.clear{
    clear: both;
}